Optical medium for registration of holographic interferograms
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United States of America Patent
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May 6, 2003
Grant Date -
N/A
app pub date -
Jun 1, 2000
filing date -
Oct 28, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to the photo-sensitive thermoplastic top-layer of optical media for registration of holograms, where the media consists of three transparent layers where the bottom layer is a glass substrate, the mid layer is an electro-conductive film of tin dioxide, and the top layer is a thermoplastic photo-sensitive amorphous molecular semiconductor film made of a matrix which has donor properties and forms transport bands for holes, and were the matrix is doped with; a photo-sensitive substance (CICT) that has intramolecular physically separated parts with donor and acceptor properties, respectively, and which creates an intramolecular electron-hole pair when absorbing a light quantum, and which has a HOMO-level which is below the HOMO-level of the matrix substance, and a substance with acceptor properties that forms transport bands for electrons, which has a similar ring structure as the acceptor part of CICT to ensure a barrierless transfer of excited electrons from CICT to acceptor-molecules and which has attached a large hydrocarbon chain in order to enhance the plasticity of the film and to provide steric hindrance for the formation charge transfer complexes between acceptor and matrix molecules.
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